Matrix: Schenk_IBMSDS/2D_54019_highK

Description: Olaf Schenk, Univ. Basel: IBM TJ Watson, Yorktown, semiconductor device

Schenk_IBMSDS/2D_54019_highK graph Schenk_IBMSDS/2D_54019_highK graph
(bipartite graph drawing) (graph drawing of A+A')

Schenk_IBMSDS/2D_54019_highK dmperm of Schenk_IBMSDS/2D_54019_highK

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  • download as a MATLAB mat-file, file size: 5 MB. Use UFget(955) or UFget('Schenk_IBMSDS/2D_54019_highK') in MATLAB.
  • download in Matrix Market format, file size: 6 MB.
  • download in Rutherford/Boeing format, file size: 4 MB.

    Matrix properties
    number of rows54,019
    number of columns54,019
    nonzeros486,129
    structural full rank?yes
    structural rank54,019
    # of blocks from dmperm7,157
    # strongly connected comp.7,157
    explicit zero entries510,285
    nonzero pattern symmetry 100%
    numeric value symmetry 19%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorIBM
    editorO. Schenk
    date2003
    kindsemiconductor device problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 54019-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD4,228,992
    Cholesky flop count9.9e+08
    nnz(L+U), no partial pivoting, with AMD8,403,965
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD5,284,916
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD9,900,924

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 510285 explicit zero entries.

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.